CN219774458U - Structure for balancing axial force of magnetic suspension compressor - Google Patents
Structure for balancing axial force of magnetic suspension compressor Download PDFInfo
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- CN219774458U CN219774458U CN202320479019.3U CN202320479019U CN219774458U CN 219774458 U CN219774458 U CN 219774458U CN 202320479019 U CN202320479019 U CN 202320479019U CN 219774458 U CN219774458 U CN 219774458U
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- 239000000725 suspension Substances 0.000 title claims abstract description 29
- 238000007789 sealing Methods 0.000 claims abstract description 31
- 238000005096 rolling process Methods 0.000 claims abstract description 5
- 238000005339 levitation Methods 0.000 claims 3
- 230000006835 compression Effects 0.000 abstract description 14
- 238000007906 compression Methods 0.000 abstract description 14
- 230000001105 regulatory effect Effects 0.000 description 7
- 230000000694 effects Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 229910000990 Ni alloy Inorganic materials 0.000 description 3
- 230000005489 elastic deformation Effects 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000007405 data analysis Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
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Abstract
The utility model discloses a structure for balancing axial force of a magnetic suspension compressor, wherein a primary impeller is arranged in primary compression, a secondary impeller is arranged in secondary compression, the diameter of the primary impeller is larger than that of the secondary impeller, the primary impeller and the secondary impeller are oppositely arranged at two sides of a rotor, the axial force of the whole rotor of the compressor is balanced by adjusting the sizes of the primary impeller and the secondary impeller, conical teeth are arranged at the back of the primary impeller and the secondary impeller, straight teeth are arranged at the contact positions of a primary shaft seal and a secondary shaft seal and the contact positions of the conical teeth and the straight teeth, the gas yield of the compressor is improved by a sealing structure formed by the conical teeth and the straight teeth, the axial force generated by the rotation of the conical teeth balances the axial force generated by the rotation of the primary impeller and the secondary impeller, and an adjusting piece is arranged at the back of the impeller, and a gap exists between the impeller and the shaft seal by the matching of the adjusting piece and a rolling shaft, so that scratch is prevented.
Description
Technical Field
The utility model relates to the field of internal structural design of magnetic suspension compressors, in particular to a structure for balancing axial force of a magnetic suspension compressor.
Background
The utility model provides a magnetic suspension centrifugal compressor is a high-efficient energy-conserving compressor, it adopts the magnetic suspension bearing, let the rotor during operation of compressor be in a suspension state to do not produce mechanical contact with the frame when rotatory, avoided mechanical friction, but because its rotational speed is higher, when the rotational speed reaches more than 3 ten thousand revolutions, can lead to the axial thrust to be greater than the yield strength of material, lead to the compressor to damage, for making the magnetic suspension centrifugal compressor rotational speed break through to higher, scientific researchers have done a lot of attempts, for example:
the Chinese patent document with publication No. CN112983849B discloses a centrifugal compressor structure with automatic balancing of axial force, wherein a first-stage impeller and a second-stage impeller are respectively arranged in a first-stage volute on two sides of the compressor, a first-stage shaft seal and a second-stage shaft seal are arranged between the first-stage volute and the second-stage impeller, the first-stage shaft seal and the second-stage shaft seal are provided with vent holes, the impellers are hung at two ends of a rotor through the structure to offset the axial force mutually, the vent holes are communicated with the backs of the first-stage impeller and the second-stage impeller to play a role in balancing the axial force, but the vent holes are arranged at the backs of the impellers to solve the problem of controlling the magnitude of buffer air flow, and radial sealing teeth only play a sealing role on a main rotating shaft and cannot play a sealing role on the backs of the impellers.
Disclosure of Invention
The utility model provides a structure for balancing axial force of a magnetic suspension centrifugal compressor, which solves the problem that the magnetic suspension centrifugal compressor is limited in rotating speed by using different technical schemes compared with the prior art, can effectively ensure that the magnetic suspension centrifugal compressor can increase the rotating speed on the premise of safety, and has the advantages of balancing the axial force, improving the structural stability and increasing the gas production.
The utility model adopts the technical scheme for solving the technical problems that the structure for balancing the axial force of the magnetic suspension compressor comprises a primary impeller and a secondary impeller, wherein the back parts of the primary impeller and the secondary impeller are provided with sealing structures; the inside diameter department in one-level impeller and second grade impeller back is equipped with the regulating part, and regulating part keeps away from impeller one end and is equipped with the roller bearing, and as preferred, one-level compression establishes one-level impeller, and second grade impeller is established to the second grade compression, and one, second grade impeller back all are equipped with seal structure, can prevent compressed air flow from entering into inside the compressor from the impeller back, and one, second grade impeller back is equipped with the regulating part, and the regulating part rear is equipped with the roller bearing. The adjusting piece rotates together with the rotor through the roller, and the adjusting piece is prevented from rubbing with the impeller.
One end of the adjusting piece is abutted with the inner diameter of the back of the primary impeller and the inner diameter of the back of the secondary impeller, and the other end of the adjusting piece is fixedly connected with the rolling shaft. Preferably, the adjusting piece can be a nut, the nut is fixedly connected with the roller, and the adjusting piece rotates together with the rotor through the roller, so that the friction between the adjusting piece and the impeller is avoided.
The primary impeller and the secondary impeller are oppositely arranged at two ends of the rotor, sleeved on the primary shaft, and have a diameter larger than that of the secondary impeller and are oppositely arranged at two ends of the rotor. Preferably, the first-stage impeller and the second-stage impeller are connected to the rotor through the main rotating shaft, the diameter of the first-stage impeller is larger than that of the second-stage impeller, sealing teeth are arranged behind the impellers at the two ends of the rotor, the pressure of the second-stage compression is larger than that of the first-stage compression due to different gas pressures at the gas inlet and outlet when the compressor works, the rotor of the compressor can generate an axial force towards the first-stage compression, the diameter of the first-stage impeller is calculated, the diameter of the first-stage impeller is larger than that of the second-stage impeller, therefore, the pressure born by the first-stage impeller is larger than that of the second-stage impeller, the axial force generated on the rotor is balanced, gaps exist between the sealing teeth behind the first-stage impeller and the second-stage impeller, and when the compressor rotates, the pressure generated by the gaps and the axial force born by the impeller are mutually abutted against each other, so that the axial force born by the impeller tends to be balanced. Meanwhile, the sealing teeth reduce the leakage amount of gas, so that the effect of improving the gas production rate is achieved.
The back of the primary impeller is provided with a primary shaft seal, the back of the secondary impeller is provided with a secondary shaft seal, and the contact parts of the primary impeller and the secondary impeller with the primary shaft seal are provided with sealing structures; and a gap exists between the primary and secondary impellers and the primary and secondary shaft seals. Preferably, the back of the primary impeller is provided with a primary shaft seal, the back of the secondary impeller is provided with a secondary shaft seal, and the contact parts of the primary impeller and the secondary impeller and the primary shaft seal and the secondary shaft seal are provided with sealing structures. The sealing structure improves the tightness of the utility model and improves the gas production, and the sealing tooth structure behind the impeller divides the gas pressure behind the impeller into a plurality of parts, so that the pressure born by the impeller reduces the clearance between the back of the impeller and the corresponding shaft seal behind the impeller through the adjusting piece. Further prevent scratch.
The sealing structure seals through the sealing teeth, the sealing teeth are divided into conical teeth and straight teeth which are used as optimization, and the sealing structure seals through the sealing teeth. The axial force can be generated by the bevel gears, and the distance and the number of the bevel gears are different due to the different diameters of the first-stage impeller and the second-stage impeller, so that the generated axial force is different, the diameter of the impeller is adjusted by calculating the axial force required by the first-stage impeller and the second-stage impeller, and the stress positions of the first-stage impeller and the second-stage impeller are controlled, so that the axial force of the second-stage impeller is balanced better.
The back of the first-stage impeller and the second-stage impeller are provided with bevel gears, and the joint parts of the first-stage shaft seal and the second-stage shaft seal and the bevel gears are provided with straight gears. Preferably, the back of the first-stage impeller and the second-stage impeller are provided with bevel gears, and the joint parts of the first-stage shaft seal and the second-stage shaft seal and the bevel gears are provided with straight gears. The bevel gear bearing capacity is strong, and the cooperation of straight tooth and bevel gear can be less the vibration when impeller operation, noise reduction also lets the transmission process more steady.
And a gap is reserved between the bevel gear and the straight gear. Preferably, a gap is reserved between the bevel gear and the straight gear. Under high-speed operation, a space sealing layer is formed between the gaps, so that the gas leakage is reduced, and the effect of improving the gas yield is achieved.
The first-stage impeller and the second-stage impeller are connected to the rotor through the main rotating shaft, the first-stage impeller and the second-stage impeller are sleeved with the main rotating shaft, and nuts are arranged at the heads of the first-stage impeller and the second-stage impeller. Preferably, the primary impeller and the secondary impeller are connected to the rotor through a main rotating shaft, the primary impeller and the secondary impeller are sleeved on the main rotating shaft, and nuts are arranged at the heads of the primary impeller and the secondary impeller. After the gaps among the sealing teeth are adjusted, the first-stage impeller and the second-stage impeller are fixed by nuts, so that the gaps among the sealing teeth are not changed during operation, and the sealing effect and the balance of axial force are more stable.
The middle parts of the first-stage impeller and the second-stage impeller extend towards the back and are cylindrical. Preferably, the middle parts of the first and second impellers extend towards the back. The extended portion increases the friction between the primary and secondary impellers and the main shaft, so that the primary and secondary impellers are more stably fixed in an ideal position. It is further preferred that the main shaft is made of a nickel alloy. During installation, the main rotating shaft is stretched by the hydraulic machine, and due to elastic deformation, a second gap exists between the main rotating shaft and the primary impeller and the secondary impeller, the second gap disappears after the hydraulic machine is removed, and due to elastic deformation, the primary impeller and the secondary impeller are firmly fixed with the main rotating shaft. Preferably, the main shaft passes through the first and second impellers to be in threaded connection with the rotor, the nut is sleeved on the main shaft and is tightly attached to the heads of the first and second impellers, the threaded part of the main shaft on which the nut is mounted is deformed after the main shaft is elongated, at the moment, after the nut is fixed, the force applied to the main shaft is removed, the main shaft is restored to the initial position, then the pressure between the thread and the nut is increased, and the friction force is increased, so that the nut is firmly fixed. Thereby firmly fixing the primary impeller and the secondary impeller. Preferably, the middle parts of the first-stage impeller and the second-stage impeller extend towards the back and are cylindrical, so that the contact area between the first-stage impeller and the second-stage impeller and the main rotating shaft is increased, the friction force is increased, and the first-stage impeller and the second-stage impeller are better fixed.
The utility model effectively solves the problem that the axial force is overlarge and larger than the material yield strength when the magnetic suspension centrifugal compressor runs at high speed. The magnetic suspension centrifugal compressor is limited by the yield strength of materials, the problem that the magnetic suspension centrifugal compressor is easy to damage when in operation is solved, the rotating speed of the magnetic suspension centrifugal compressor can be effectively improved on the premise of safety, and the magnetic suspension centrifugal compressor has the advantages of enabling the axial force to be balanced and stable and improving the gas production.
Drawings
FIG. 1 is a block diagram of one application of the present utility model;
FIG. 2 is a block diagram of the present utility model;
FIG. 3 is a view of the impeller and shaft seal of the present utility model;
FIG. 4 is a view showing the cooperation of the impeller and the main shaft of the present utility model;
FIG. 5 is a block diagram of an impeller of the present utility model;
FIG. 6 is a block diagram of the shaft seal of the present utility model.
In the figure: 1. the device comprises a first-stage impeller, a first-stage shaft seal, a second-stage impeller, a second-stage shaft seal, a rotor, a gap, a bevel gear, a sealing structure, a straight gear, a main rotating shaft, a nut, an adjusting piece, and a roller.
Detailed Description
The following describes a specific embodiment of the technical scheme of the present utility model by way of examples and with reference to the accompanying drawings.
Examples
In the embodiment shown in fig. 1, 2 and 3 and 4, the structure for balancing the axial force of the magnetic suspension compressor comprises a rotor 5, wherein two ends of the rotor 5 are oppositely provided with a first-stage impeller 1 and a second-stage impeller 3, when the magnetic suspension compressor rotates, the axial force direction of the whole compressor is towards the first-stage compression because the first-stage compression pressure is smaller than the second-stage compression pressure, therefore, whenever the diameter of the first-stage impeller 1 is larger than the diameter of the second-stage impeller 3, the diameter of the first-stage impeller and the second-stage impeller with proper diameters are selected through data analysis and calculation, the stress area is large because the diameter of the first-stage impeller 1 is large, the pressure of the first-stage impeller 1 is increased under the condition of constant pressure, so that the pressure is balanced with the pressure of the second-stage impeller 3, the axial force on the rotor 5 is balanced, the axial force of the whole compressor is balanced, and the first-stage impeller and the second-stage impeller are also subjected to the axial force during rotation, in order to prolong the service life of the impeller and improve the durability of the compressor, the back parts of the first-stage impeller and the second-stage impeller are provided with bevel gears 7, the bevel gears 7 generate axial force when rotating, the axial force is balanced with the axial force generated by the rotation of the first-stage impeller and the second-stage impeller, so that the first-stage impeller 1 and the second-stage impeller 3 have no axial force or are smaller in the axial force, the back part of the first-stage impeller 1 is provided with a first-stage shaft seal 2, the back part of the second-stage impeller 3 is provided with a second-stage shaft seal 4, the contact parts of the back parts of the first-stage impeller and the second-stage impeller and the first-stage shaft seal and the second-stage shaft seal are provided with sealing structures 8, the back parts of the first-stage impeller and the second-stage impeller are provided with the bevel gears 7, the contact parts of the first-stage shaft seal and the second-stage shaft seal and the bevel gears 7 are provided with straight gears 9, the bearing capacity of the bevel gears 7 is strong, the straight gears 9 and the cooperation of the bevel gears 7 can reduce vibration when the first-stage impeller and the second-stage impeller operate, the noise is reduced, the transmission process is more stable, the middle part of the first and second impellers extends towards the back, the extension is cylindrical, the contact area between the first and second impellers and the main rotating shaft 10 is increased, the friction force between the first and second impellers and the main rotating shaft 10 is increased, the first and second impellers are more stably fixed on the main rotating shaft 10, the first and second impellers are sleeved with the main rotating shaft 10, the nut 11 is arranged at the head of the first and second impellers and used for fixing the position of the first and second impellers on the main rotating shaft 10, the first gap 6 formed between the seal tooth bevel gear 7 and the straight tooth 9 is fixed, the nut 11 is fixed by threads of the main rotating shaft 10, the material of the main rotating shaft 10 is nickel alloy, the nickel alloy has good toughness, the main rotating shaft 10 is stretched by a hydraulic machine, then the first and second impellers and the nut are installed, when the force on the main rotating shaft 10 is removed, the pressure is high between the main rotating shaft 10 and the first and second impellers, the friction force is high, the first and second impellers are firmly fixed, the same, the first and second impellers are arranged at the same, the end of the first and the second impellers are fixed by the corresponding pressure, and the nut 11 are fixed by threads, and the nut 11 are deformed by threads, and the nut is deformed by threads and the threads of the nut is fixed between the first and the nut. Under high-speed operation, a plurality of bevel gears 7 and corresponding straight teeth 9 in first space 6 form a plurality of sealing layers, reduce the lapse of gas, improve the gas yield of magnetic suspension centrifugal compressor, the setting of sealing layer is through the effect of atmospheric pressure, through calculating the contrast of first, second grade impeller atress size, and then design the cooperation structure of sealing layer, reach the effect of balanced first, second grade impeller self axial force, main pivot 10 and rotor 5 axial screwed connection, screw thread and rotor 5 rotation opposite direction makes the magnetic suspension centrifugal compressor when operation, and main pivot 10 can be tighter and tighter with rotor 5's connection, can not take place to drop, in order to guarantee the smoothness when impeller is operated, still be equipped with regulating part 14 in the back internal strength department of impeller, regulating part 14 front end and impeller back butt have roller 15 by the rigid coupling, the impeller is jacked by regulating part 14, makes there is the clearance between impeller and the shaft seal, avoids the impeller to scratch the shaft seal.
The utility model relates to a structure assembly process for balancing axial force of a magnetic suspension compressor and an action principle thereof, wherein the structure assembly process comprises the following steps:
after a proper main rotating shaft 10 is fixedly connected with two ends of a rotor 5 in a spiral manner, a proper primary impeller and a proper secondary impeller are selected, a primary shaft seal 2 is arranged in primary compression, the primary impeller 1 is installed on the primary shaft seal 2, the main rotating shaft 10 is stretched by a hydraulic machine, the elastic deformation of the main rotating shaft 10 is changed, the primary impeller 1 is installed at the moment, the positions between the bevel teeth 7 at the back of the primary impeller 1 and the straight teeth 9 on the primary shaft seal 2 are adjusted, the primary impeller 1 is installed at a designated position, a nut 11 is screwed on, the nut 11 firmly leans against the end part of the primary impeller 1, the force applied by the hydraulic machine to the main rotating shaft 10 is removed, the main rotating shaft is restored to the initial position, the primary impeller 1 and the main rotating shaft 10 are extruded, so that the primary impeller 1 is fixed, threads arranged at the position of the main rotating shaft 10 corresponding to the position of the installation nut 11 and the internal threads of the nut 11 are extruded, so that the friction force is increased, the nut 11 is firmly fixed at the end part of the primary impeller 1, the installation and principle of the secondary compression are the same relative to the primary compression, a secondary shaft seal 4 is arranged in the secondary compression, the secondary impeller 3 is installed on the secondary shaft seal 4, a main rotating shaft 10 is stretched by a hydraulic machine, the main rotating shaft 10 is elastically deformed, the secondary impeller 3 is installed at the moment, the position between a bevel gear 7 at the back part of the secondary impeller 3 and a straight gear 9 on the secondary shaft seal 4 is adjusted, the secondary impeller 3 is installed at a designated position, the nut 11 is screwed on, the nut 11 firmly leans against the end part of the secondary impeller 3, the force applied by the hydraulic machine to the main rotating shaft 10 is removed, the main rotating shaft is restored to the initial position, the secondary impeller 3 and the main rotating shaft 10 are extruded, the secondary impeller 3 is fixed, threads arranged at the position of the main rotating shaft 10 corresponding to the position where the nut 11 is installed and the internal threads of the nut 11 are extruded, the friction force is increased, the whole structure can stably run, the adjusting piece 14 is arranged at the inner diameter of the back of the impeller, the adjusting piece 14 separates the impeller from the shaft seal to form a gap, one end, far away from the impeller, of the adjusting piece 14 is further provided with the rolling shaft 15, and the back of the impeller is prevented from being scratched by the adjusting piece 14.
Claims (9)
1. The structure for balancing the axial force of the magnetic suspension compressor is characterized by comprising a primary impeller (1) and a secondary impeller (3), wherein the back parts of the primary impeller (1) and the secondary impeller (3) are provided with sealing structures (8);
the back inner diameter of the primary impeller (1) and the back inner diameter of the secondary impeller (3) are provided with adjusting pieces (14), and one end, far away from the impellers, of each adjusting piece (14) is provided with a rolling shaft (15).
2. A structure for balancing axial force of a magnetic suspension compressor according to claim 1, wherein one end of the adjusting piece (14) is abutted against the inner diameter of the back of the primary impeller (1) and the inner diameter of the back of the secondary impeller (3), and the other end of the adjusting piece is fixedly connected with the rolling shaft (15).
3. A structure for balancing axial force of a magnetic suspension compressor as claimed in claim 1, wherein the primary impeller (1) and the secondary impeller (3) are sleeved with a main rotating shaft (10), the main rotating shaft (10) is oppositely arranged at two ends of the rotor (5), the primary impeller and the secondary impeller are oppositely arranged at two ends of the rotor (5), and the diameter of the primary impeller (1) is larger than that of the secondary impeller (3) and is oppositely arranged at two ends of the rotor (5).
4. A structure for balancing axial force of a magnetic suspension compressor as claimed in claim 1, 2 or 3, wherein a primary shaft seal (2) is arranged at the back of the primary impeller (1), a secondary shaft seal (4) is arranged at the back of the secondary impeller (3), and a sealing structure (8) is arranged at the contact part of the primary impeller and the secondary impeller with the primary shaft seal and the secondary shaft seal; and a gap exists between the primary and secondary impellers and the primary and secondary shaft seals.
5. A structure for balancing axial forces of a magnetic levitation compressor according to claim 4, wherein the sealing structure (8) is sealed by means of sealing teeth, said sealing teeth being divided into conical teeth (7) and straight teeth (9).
6. A structure for balancing axial force of a magnetic suspension compressor as claimed in claim 5, wherein the back parts of the first and second impellers are provided with bevel teeth (7), and the connecting parts of the first and second shaft seals and the bevel teeth (7) are provided with straight teeth (9).
7. A structure for balancing axial forces of a magnetic levitation compressor according to claim 5 or 6, characterized in that a gap (6) is left between the conical tooth (7) and the straight tooth (9).
8. A structure for balancing axial force of a magnetic suspension compressor according to claim 3, characterized in that the primary and secondary impellers are connected to the rotor (5) through a main rotating shaft (10), the primary and secondary impellers are sleeved with the main rotating shaft (10), and nuts (11) are arranged at the heads of the primary and secondary impellers.
9. A structure for balancing axial force of magnetic levitation compressor as defined in claim 1 or 2 or 3 or 5 or 6 or 8, wherein said middle part of said first and second impellers extends toward back and is cylindrical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320479019.3U CN219774458U (en) | 2023-03-06 | 2023-03-06 | Structure for balancing axial force of magnetic suspension compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320479019.3U CN219774458U (en) | 2023-03-06 | 2023-03-06 | Structure for balancing axial force of magnetic suspension compressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219774458U true CN219774458U (en) | 2023-09-29 |
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ID=88132210
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320479019.3U Active CN219774458U (en) | 2023-03-06 | 2023-03-06 | Structure for balancing axial force of magnetic suspension compressor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219774458U (en) |
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2023
- 2023-03-06 CN CN202320479019.3U patent/CN219774458U/en active Active
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